Abstract
Currently, the Lithium-sulfur batteries (LSB) suffer from the issue of severe “polysulfide shuttle”, else they have a great potential to support next-generation energy storage. Herein, hollow porous double-shelled Co3O4−x microspheres with abundant oxygen deficiency were prepared for lithium polysulfides (LPS) fixation. The rational hollow porous structure facilitated sulfur loading and multiple spatial confinement on LPS was implemented by the double shells. An abundant oxygen deficiency not only promoted electronic transfer but also relieved polarization during the cycling process. Hence, the S-Co3O4−x cathode delivered satisfying cycling performance and rate capability. An initial specific capacity of 1256 mAh g−1 was obtained at 0.2 C, and the capacity of 1054 mAh g−1 was maintained even after 100 cycles. At a high c-rate of 3 C, the S-Co3O4−x electrode still exhibited a specific capacity of 780 mAh g−1.
| Original language | English |
|---|---|
| Article number | 126581 |
| Journal | Materials Letters |
| Volume | 255 |
| DOIs | |
| Publication status | Published - Nov 15 2019 |
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Keywords
- Cathode
- Composite materials
- Defects
- Energy storage and conversion
- Lithium-sulfur batteries
- Oxygen deficiency
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
Cite this
Synthesis of highly defective hollow double-shelled Co3O4−x microspheres as sulfur host for high-performance lithium-sulfur batteries. / Wang, Jiayi; Wang, Wenjuan; Zhang, Yongguang; Bakenov, Zhumabay; Zhao, Yan; Wang, Xin.
In: Materials Letters, Vol. 255, 126581, 15.11.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis of highly defective hollow double-shelled Co3O4−x microspheres as sulfur host for high-performance lithium-sulfur batteries
AU - Wang, Jiayi
AU - Wang, Wenjuan
AU - Zhang, Yongguang
AU - Bakenov, Zhumabay
AU - Zhao, Yan
AU - Wang, Xin
PY - 2019/11/15
Y1 - 2019/11/15
N2 - Currently, the Lithium-sulfur batteries (LSB) suffer from the issue of severe “polysulfide shuttle”, else they have a great potential to support next-generation energy storage. Herein, hollow porous double-shelled Co3O4−x microspheres with abundant oxygen deficiency were prepared for lithium polysulfides (LPS) fixation. The rational hollow porous structure facilitated sulfur loading and multiple spatial confinement on LPS was implemented by the double shells. An abundant oxygen deficiency not only promoted electronic transfer but also relieved polarization during the cycling process. Hence, the S-Co3O4−x cathode delivered satisfying cycling performance and rate capability. An initial specific capacity of 1256 mAh g−1 was obtained at 0.2 C, and the capacity of 1054 mAh g−1 was maintained even after 100 cycles. At a high c-rate of 3 C, the S-Co3O4−x electrode still exhibited a specific capacity of 780 mAh g−1.
AB - Currently, the Lithium-sulfur batteries (LSB) suffer from the issue of severe “polysulfide shuttle”, else they have a great potential to support next-generation energy storage. Herein, hollow porous double-shelled Co3O4−x microspheres with abundant oxygen deficiency were prepared for lithium polysulfides (LPS) fixation. The rational hollow porous structure facilitated sulfur loading and multiple spatial confinement on LPS was implemented by the double shells. An abundant oxygen deficiency not only promoted electronic transfer but also relieved polarization during the cycling process. Hence, the S-Co3O4−x cathode delivered satisfying cycling performance and rate capability. An initial specific capacity of 1256 mAh g−1 was obtained at 0.2 C, and the capacity of 1054 mAh g−1 was maintained even after 100 cycles. At a high c-rate of 3 C, the S-Co3O4−x electrode still exhibited a specific capacity of 780 mAh g−1.
KW - Cathode
KW - Composite materials
KW - Defects
KW - Energy storage and conversion
KW - Lithium-sulfur batteries
KW - Oxygen deficiency
UR - http://www.scopus.com/inward/record.url?scp=85071336350&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071336350&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2019.126581
DO - 10.1016/j.matlet.2019.126581
M3 - Article
VL - 255
JO - Materials Letters
JF - Materials Letters
SN - 0167-577X
M1 - 126581
ER -